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Fluke Calibration Blog

Calibration Equipment & Standards and Calibration Software

Mar 20, 2018

Steve Potter, Global Marketing Manager at Fluke Calibration

Steve Potter

Don’t get fooled: what to look for when buying an isothermal bath
If you’re in the market for an isothermal bath (temperature calibration bath), you may have already noticed that many suppliers provide technical specifications that are confusing or incomplete. You might only be able to find a performance spec for a single temperature point, not for the bath’s whole temperature range. Or they don’t say which bath fluid was used in testing.   An isothermal calibration bath is a significant investment so you need to get enough information – and the right...
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Mar 31, 2017

Jeff Gust, Chief Corporate Metrologist at Fluke Corporation

Jeff Gust

Memo on the traceability, calibration, and recalibration requirements for Fluke coils
Purpose It is a well-established practice in calibration laboratories to use current coils for clamp meter calibrations. Many laboratories either build their own coil, or simply make several loops of a test lead for the purpose of increasing the current value sensed by the clamp meter. Fluke has designed and manufactured several current coils for the purpose of clamp meter calibration. Customers have requested calibration for Fluke coils and some accreditation bodies have established policies...
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Nov 17, 2016

Tim Francis, Business Unit Manager, Pressure & Flow, at Fluke Calibration

Tim Francis

Pressure Gauge Calibration without Contamination
Most pumps used for calibration above 600 psi tend to be hydraulic. Since hydraulic pumps use fluids to generate pressure, liquid contamination of the system being calibrated is a definite risk. To avoid liquid contamination gas is used instead. The old-fashioned way to supply gas pressure above 600 psi is with a gas cylinder. However, working with a gas cylinder is both a burden and a safety risk. For field calibration, the best solution is a pneumatic pump designed for pressures up to 3000...
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Oct 25, 2016

Tim Francis, Business Unit Manager, Pressure & Flow, at Fluke Calibration

Tim Francis

How to calibrate at the bench with a deadweight tester
A deadweight tester is a proven method of pressure calibration that is usually chosen for bench applications when accuracy and reliability are the top requirements. Calibrations are performed at the bench for convenience and to maintain reference conditions. The bench is a convenient location to clean, inspect, calibrate and repair with all the necessary equipment available. Reference conditions are necessary to achieve the reference accuracy of the device under test and the calibration...
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Jul 29, 2016

Rich McFadden, Sr. Marketing Manager at Fluke

Richard McFadden

Best practices for cabling and test leads in electrical calibration
You might not think of a cable as an electrical instrument; however, leads and cabling are the foremost cause of measurement errors in the calibration lab. Here are three things to keep in mind so you can avoid unnecessary errors: Cabling and leads must be suitable for the work you’re performing. Consider: Safety and category (CAT) ratings The accuracy required for your measurement The type of measurement being performed Whether the leads will be used in a controlled or non-controlled...
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Mar 07, 2016

Tim Francis, Business Unit Manager, Pressure & Flow, at Fluke Calibration

Tim Francis

Replacing your old pressure controller? Here are five things you should know.
You might want to replace your pressure controller if: It's obsolete and the manufacturer doesn't support it anymore. It's broken or not working and you can't repair it, or it costs too much to repair. The advanced capabilities of a new controller provides value to your business. Before you set out to shop for a new pressure calibrator, here are some things you should consider. Workload coverage Look at the workload your old instrument is calibrating. Has your workload grown over the years...
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Feb 18, 2016

Rich McFadden, Sr. Marketing Manager at Fluke

Richard McFadden

7 important facts you must know before calibrating a clamp meter
A current clamp measures current via the non-contact method, making it safer and less troublesome to acquire a measurement. It usually has additional measurement functions such as voltage and continuity. A clamp meter typically requires an annual calibration to ensure that it continues to make measurements within the manufacturer’s specifications.   Here are 7 important things to consider when calibrating a clamp meter:   1. Clamp meters come in all shapes and sizes. Ergonomics and...
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Feb 09, 2016

Steve Potter, Global Marketing Manager at Fluke Calibration

Steve Potter

Selecting the right temperature probe-to-readout adapter
A temperature probe is typically ordered with a termination that matches the calibration equipment it will be used with. For example, a 5615 Secondary Standard PRT used with a 914X Field Metrology Well would be ordered with a type A termination (INFO-CON DIN 6-pin). If you want to use this 5615 probe with a different readout like a 1524 Reference Thermometer that does not accept a type A termination, what do you do? Check out our Probe-to-Readout Adapter Guide » to see which adapter is needed....
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Jan 21, 2016

Rich McFadden, Sr. Marketing Manager at Fluke

Richard McFadden

Understanding the basics of digital multimeter calibration
Why calibrate? A digital multimeter (DMM) is one of the most commonly used pieces of test and measurement instrumentation. Quality processes depend on its continual proper operation. However, time, environment, and physical use (or abuses) change a DMM’s characteristics. That’s why it’s important to periodically calibrate or verify the performance of a DMM. We’ve published an application note, “Why calibrate test equipment?” that provides more detailed information about calibration and why it...
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Jan 08, 2016

Jeff Gust, Chief Corporate Metrologist at Fluke Corporation

Jeff Gust

Introduction to the ISO Guide to the Expression of Uncertainty of Measurement (GUM)
When an instrument is calibrated, the measurements should be traceable back to a common standard such as the international system of units (SI). By definition, one cannot have a traceable measurement without uncertainty, which means we have to estimate it and communicate it in each step of the traceability chain. If traceability is important to you, then you must be able to understand and quantify uncertainty. Estimating measurement uncertainty is one of the most challenging tasks that...
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